Bump antlr4 from 4.7.2 to 4.8-1

Bumps [antlr4](https://github.com/antlr/antlr4) from 4.7.2 to 4.8-1.
- [Release notes](https://github.com/antlr/antlr4/releases)
- [Changelog](https://github.com/antlr/antlr4/blob/master/CHANGES.txt)
- [Commits](https://github.com/antlr/antlr4/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

build.gradle

@@ -137,7 +137,7 @@ dependencies {
     antlr3 'org.antlr:antlr:3.5.2'
     compile 'org.antlr:antlr-runtime:3.5.2'
 
-    antlr4 'org.antlr:antlr4:4.7.2'
+    antlr4 'org.antlr:antlr4:4.8-1'
     compile 'org.antlr:antlr4-runtime:4.8-1'
 
     compile group: 'org.mariadb.jdbc', name: 'mariadb-java-client', version: '2.5.3'